Fluid spray nozzle



July 7,1959 c. c. BATTS- 2,893,646

FLUID SPRAY NOZZLE Filed Oct. 7, 1958 M C- 6am INVENTOR ATTORNEYS United States Patent FLUID SPRAY NOZZLE Charles C. Batts, Hampton, Va. 7 Application October 7, 1958, Serial No. 765,812

4 Claims. or. 239-419 I This invention relates generally to a fluid spray nozzle and more particularly to the structure of a non-clogging nozzle of the multiple outlet type designed to achieve a uniform distribution of a fluid spray pattern.

The primary object of my invention is to provide a fluid spray nozzle having a body with a cylindrical sleeve portion in which is tightly fitted coaxially a cylindrical plug having concave recesses in each end thereof and a plurality of longitudinal passages extending therethrough in a circular'pattern relative to the central axis of the plug.

Another object of my invention is to provide a fluid spray nozzle having a turbulency chamber therein defindintermediate a concave recessed wall inone end of-a cylindrical plug and a transverse wall of the nozzle body and adapted to produce a cylindrical hollow spray pattern.

Still another object of my invention is to provide a mixing spray nozzle having a turbulency chamber into which are introduced a plurality of dissimilar fluids, said turbulency chamber being defined by a recess in one wall of a cylindrical plug, said plug being solid in the central portion thereof and having a plurality of longitudinal passages therein arranged circularly with respect to the longitudinal axis thereof.

A more specific object of my invention is to provide a spray nozzle having a nozzle body with an open-ended sleeve portion within which is coaxially mounted a radially compressible plug, said plug having a concave recess at each end thereof to permit radial expansion of the ends of the plug whereby said plug is maintained in position within said nozzle body sleeve portion.

Other objects and advantages of my invention will become more apparent from a study of the following specification when considered in conjunction with the accompanying drawings in which:

Fig. 1 is a longitudinal sectional view of the spray nozzle taken along line 1-1 of Fig. 2;

Fig. 2 is an elevational end view of the nozzle; and

Fig. 3 is a longitudinal sectional view of the mixing nozzle embodiment of my invention.

Referring now more particularly to Figs. 1 and 2, the nozzle consists of a cylindrical body 1 having a sleeve portion 2 and a shank portion 3 provided with screw threads 4 on the periphery thereof. The cylindrical'body is formed from a hard metal such as brass, steel or aluminum, or any other suitable alloy. Tightly fitted coaxially within the sleeve 2 is a cylindrical plug member 5 having a plurality of parallel bores 6 extending axially therethrough. At each end the plug 5 has a concave recess defined by the curved end walls 5a, 512. Between the end wall 5b and the transverse radial portion 2a of the sleeve is defined a fluid turbulency chamber 7.

The operation of the non-clogging dispersion nozzle may now be readily described.

When the nozzle 1 is threadably connected by means of the screw threads 4 to the fluid pressure supply source 8, fluid (in the liquid or gaseous state) is conducted through the shank bore 9 into the turbulency chamber 7. The fluid stream is directed from the outlet of sage 9 against the solid curved central portion of the end wall 5b and is diverted radially outwardly in-a turbulent manner to substantially fill the chamber 7. 'As the pressure in chamber 7 increases the fluid enters the axial passages 6 and is conducted therethrough in parallel paths to the other end wall 5a of the plug through which 1 the fluid is emitted in a plurality of parallel circularly Thus the spray pattern of the fluid emitted from the nozzle is in the form of a'rather sharply defined hollow cylinder of uniform It should be mentioned that the concave end wall 5a of the outlet end of the plug further assists in achieving a uniform spray pattern. For example, when the nozzle is used with a gaseous fluid containing small particles of liquid (i.e., air containing small particles of moisture),-- the liquid particles will be ejected axially from the plug" and will not collect in the solid central portion of the In spray nozzles of the prior art having a planar end wall at the ejecting end of the plug, liquid particles often collect and run down the wall surface by" gravity to cause interference with the fluid jets emitted I from the lowermost passages 6, thus adversely, affecting arranged jets (Fig. 2).

concave recess.

the spray pattern.

-It should be mentioned that the plug 5 is preferably formed of a slightly compressible material such as'a synthetic plastic, wood, rubber, soft metal or the like. After the plug 5 has; beenv tightly fitted within-the sleeve portion 2 of the nozzle, thespecific configurationof-the plug (i.e., the concave recesses at each end thereof) permits a slightly radial expansion at each end of the plug during use at high fluid pressures to assist in preventing the plug from being displaced to the right in Fig. 1 and from being forced axially from the sleeve by the impingement of the high pressure fluid stream upon the solid central portion of the end wall 5b.

Should small particles of solid impurities be present in the fluid emitted from passage 9, the particles will be collected in the chamber 7 due to the turbulence of the fluid therein and will not pass into the passages 6 to cause the clogging and closure thereof. If it should be desired periodically to clean out the chamber 7, the nozzle would be unscrewed from the supply 8 (spray gun, pressure line, etc.) and a suitable tool would be inserted axially through the bore 9 to push the plug 5 to the right in Fig. 1 relative to the sleeve portion 2. If desired, the plug 5 could be reversed and reinserted into the sleeve portion 2 with the end wall 5a adjacent the radial transverse portion 2a of the nozzle.

One application for which the nozzle of Figs. 1 and 2 has been found to be particularly suitable is in barber shops and beauty salons wherein compressed air is emitted in a hollow cylindrical spray pattem from a manually-operated portable nozzle to blow hair clippings from the head, neck and clothes of a patron. Other applications of the nozzle are contemplated where drying air is to be directed in a uniform pattern on a highly localized surface, and where liquid fluids are to be deposited uniformly upon a relatively small object.

According to the embodiment of Fig. 3, the nozzle is also particularly adaptable for use as a fluid-mixing nonclogging nozzle which produces a uniform spray pattern. According to this embodiment a compressible plug 10 of a material similar to the material of plug 5 (Fig. 1) is tightly fitted within the sleeve portion 11 of the mixing nozzle body 12. The plug 10 has concave recesses in each end thereof defined by the curved end walls 10a, 10b. A turbulency chamber 13 is defined between the curved end wall 10b and the sleeve radial transverse portion 11a. Two or more dissimilar fluids may be directed upon the solid central portion of the end wall 10b through the bore 14 of the nozzle body shank por n e J y 7 1.

ion 15 and through the angularly arranged conduits 16 and 17. The fluids directed against the solid central portion of end Wall 10b will be diverted radially outwa xllyv and will be thoroughly mixed by turbulence in the turbulency'chamher 13 the mixed resulting fluid will then pass by pressure through the parallel passages 17 in the compressible plug 10 and will be emitted in the form of a uniform hollow cylindrical pattern from the plugend wall 10a. By varying the relative forces of the pressure fluids directed against solid central portion of the end wall 1%, the proportioning' of the fluids in the resulting mixture may be adjusted as desired. As in the embodiment of Figs. 1 and 2, the concave recesses in the. ends of the plug 10 serve to permit radial expansion oft-the ends of the plug and thus assist in maintaining the plug-in place within the sleeve portion 11 of the nozzle body The mixing nozzle of Fig. 3 can readily be used for atomizing applications, paint spraying, and many other types of practical applications. The specific concave recesses in each end of the plug will prevent clogging at each end of the passages 17 in the manner described above.

While in accordance with the patent statutes I have illustrated and described the best forms and embodiments of my invention now known to me, it will be apparent to those skilled in the art that other changes may be made in the apparatus described without deviating frounthe scope of my invention as set forth in the appended claims.

I claim:

1. A fluid spray nozzle comprising a metal body having a shank portion and a hollow cylindrical sleeve portion colinearly arranged with respect to said shank portion, said shank portion having an axial inlet bore extending longitudinally therethrough and terminating in an orifice opening having a smaller diameter than the internal diameter of said sleeve portion, and a cylindrical plug contiguously mounted coaxially within said body sleeve portion, said cylindrical plug having concave recesses at each end thereof and a plurality of parallel outlet passages extending longitudinally therethrough, said passages being arranged in a circle about the longitudinal axis of said plug, said axial inlet bore terminating opposite the solid central portion of the adjacent concave recess wall of the plug so that fluid directed against the solid central portion of said plug from said inlet bore will be diverted radially outwardly in said concave recess.

2. A fluid spray nozzle as defined in claim 1 wherein said cylindrical plug is formed of a material which is compressible relative to the metal of the nozzle body.

3L Apparatusa-s defined in claim 1 wherein said valve body. has at least one auxiliary inlet therein for separately directing a fluid stream also upon the central portion of said adjacent concave recess wall of the plug.

4. Apparatus as defined in claim 3 wherein the axis of said auxiliary inlet is angularly arranged with respect to the axis of said shank portion axial inlet bore.

References'Cited in the file of this patent UNITED STATES PATENTS 

